If 50W or higher it should do, but otherwise, a flame will help - eg. one of the "turbo" lighters with a pointy flame (and something nonflammable and isolating to go on the table), just be extra carefull when operating with an open flame!

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Regards,Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?Please remember...Engineering is based on numbers - not adjectives

For soldering this sort of stuff one of those butane solder pens from Radio Shack work great. Regular soldering irons I find just cool down too fast to be useful. I used to solder brass together using the butane soldering irons, endless heat for gobs of solder.